GB 5310 is the standard for seamless steel pipes specified in the Chinese national standard, especially for high-pressure boilers and high-temperature heat exchangers.
GB 5310 seamless boiler steel pipes include high-quality carbon structural steel grade 20MnG, and other alloy structural steels and stainless heat-resistant steels, such as 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc. These materials have good mechanical properties and chemical composition, and can meet the use requirements under high temperature and high pressure environments.
It is mainly used for steam boilers, pipelines, etc. with high pressure and above, as well as all devices that need cooling, such as economizers, headers, superheaters, reheaters, etc.
Products Data
Chemical Compositions(%) of GB 5310 steel pipe
| Steel grade | C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V |
|---|---|---|---|---|---|---|---|---|---|---|
| 20G | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
| 20MnG | 0.17-0.24 | 0.17-0.37 | 0.70-1.00 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
| 25MnG | 0.18-0.24 | 0.17-0.37 | 0.80-1.10 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.40-0.70 | ≤0.030 | ≤0.030 | 0.80-1.10 | 0.40-0.55 | ≤0.20 | ≤0.30 | |
| 12Cr2MoG | 0.08-0.15 | ≤0.50 | 0.40-0.70 | ≤0.030 | ≤0.030 | 2.00-2.50 | 0.90-1.20 | ≤0.20 | ≤0.30 | |
| 12Cr1MoV | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | ≤0.030 | ≤0.030 | 0.90-1.20 | 0.25-0.35 | ≤0.20 | ≤0.30 | 0.15-0.30 |
| 12Cr2MoWVTiB | 0.08-0.15 | 0.45-0.75 | 0.45-0.65 | ≤0.030 | ≤0.030 | 1.60-2.10 | 0.50-0.65 | ≤0.20 | ≤0.30 | 0.28-0.42 |
| 10Cr9Mo1VNb | 0.08-0.12 | 0.20-0.50 | 0.30-0.60 | ≤0.020 | ≤0.010 | 8.00-9.50 | 0.85-1.05 | ≤0.20 | ≤0.40 | 0.18-0.25 |
Mechanical Properties of GB5310 Seamless steel pipe
| Steel Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) |
|---|---|---|---|
| 20G | 410-550 | 245 | 24 |
| 20MnG | ≥415 | 240 | 22 |
| 25MnG | ≥485 | 275 | 20 |
| 15MoG | 450-600 | 270 | 22 |
| 12CrMoG | 410-560 | 205 | 21 |
| 12Cr2MoG | 450-600 | 280 | 20 |
| 12Cr1MoVG | 470-640 | 255 | 21 |
| 12Cr2MoWVTib | 540-735 | 345 | 18 |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 |
Products display
GB 5310 Seamless Alloy Boiler Tube
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